So, I've used 2 of my cache devices to be selected as boot + data partition. They where at "cache" pool, so set all devices from "cache" to unassigned (no device) and started the wizard. Choose 16GB, and it ask for a name for the data partition that I set "cacheta". After restart the boot partition works great, but I could not start the array as "cache - too many wrong or missing devices ". Tried to click on "cache", ERASE POOL, proceed, nothing happen, logs shows this red message: May 25 01:00:39 LeitoaNas kernel: read_file: error 2 opening /boot/config/super.dat Full log after pressing the ERASE POOL So, deleting the pool doesn't work, I can't start the pool also. Tried to unassign from "cacheta" to the old one also doesn't work as it looks that needs the previous one. Tried to delete /boot/config/pools/cache.cfg but it got recreated as soon as I ask to delete again (as it appears again at the Main). Tried to recreate a New config and selected "ALL" for "Preserve current assignments". The problematic "cache" partition was recreated. Tried to again to recreate a New Config, but now it says: "Array has been Reset (please configure)" So I'm in a catch-22 situation. I can't reconfigure as it asks for this reference of the old (non partitioned device). Can't create a New Config. Delete the new pool doesn't work. Set pool size to 0 doesn't work (it only shows 2). I'm adding a screenshot, please let me know if you have any suggestion as my array can't be started.